387642071 has 2 divisors, whose sum is σ = 387642072. Its totient is φ = 387642070.

The previous prime is 387641999. The next prime is 387642091. The reversal of 387642071 is 170246783.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 387642071 - 2¹⁰ = 387641047 is a prime.

It is a Sophie Germain prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (387642091) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 193821035 + 193821036.

It is an arithmetic number, because the mean of its divisors is an integer number (193821036).

Almost surely, 2^387642071 is an apocalyptic number.

387642071 is a deficient number, since it is larger than the sum of its proper divisors (1).

387642071 is an equidigital number, since it uses as much as digits as its factorization.

387642071 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 56448, while the sum is 38.

The square root of 387642071 is about 19688.6279613385. The cubic root of 387642071 is about 729.1389553870.

The spelling of 387642071 in words is "three hundred eighty-seven million, six hundred forty-two thousand, seventy-one".